Abstract: The Norfolk Sanitary Sewer Inventory and Appraisal System contains individual records for each of the 20,000 pipe segments in the Norfolk sewer system. The data, assembled from construction drawings, utility maps and field investigations, was transferred to planimetric maps. These maps became the master data record for the sewer system, from which all data was transferred to input forms and entered into the computer database. The inventory system allows sewer information to be analyzed, provides for testing hypotheses, provides for capital improvements programming and budgeting.